> Also I think I heard the 300/4.5 was sharper wide open. I guess > you gain sharpness by loosing a half stop.
Geoff: I recently picked up an F* 300/4.5 in great shape, but I still haven't gotten around to comparing it to the M*/A* 300/4. From what I have heard here on the PDML, the 300/4.5 might indeed be sharper wide open than the 300/4 wide open - time will tell. (And the tripod mount on the F* is a real plus.) However, sometimes that extra half-stop of light can be significant, especially when hand-holding a 300mm lens in less than ideal light. And, the 300/4 must be infinitely better at f/4 than the 300/4.5 would be at f/4, right? <g> Fred - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
